Heat 6
vendredi 3 août 2018, 11h13 GMT – 11h13 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Sarah Sjöström | Sweden | 24.14″ |
| 2 |  Mariya Kameneva | Russia | + 0.25″ |
| 3 | Julie Jensen | Denmark | + 0.86″ |
| 4 | Rozaliya Nasretdinova | Russia | + 0.87″ |
| 5 | Nina Kost | Switzerland | + 1.15″ |
| 6 | Lidón Muñoz | Spain | + 1.18″ |
| 7 | Lucrezia Raco | Italy | + 1.35″ |
| 8 |  Anouchka Martin | France | + 1.45″ |
| 9 | Freya Anderson | Great Britain | + 1.56″ |
| 10 | Anna Kolárová | Czech Republic | + 1.63″ |